<template>
    <div class="app-container">
      <el-form label-width="120px">
        <el-form-item label="讲师名称">
          <el-input v-model="teacher.name" />
        </el-form-item>
        <el-form-item label="讲师排序">
          <el-input-number
            v-model="teacher.sort"
            controls-position="right"
            min="0"
          />
        </el-form-item>
        <el-form-item label="讲师头衔">
          <el-select v-model="teacher.level" clearable placeholder="选择讲师头衔">
            <!--
数据类型一定要和取出的json中的一致，否则没法回填
因此，这里value使用动态绑定的值，保证其数据类型是number
-->
            <el-option :value="1" label="高级讲师" />
            <el-option :value="2" label="首席讲师" />
          </el-select>
        </el-form-item>
        <el-form-item label="讲师资历">
          <el-input v-model="teacher.career" />
        </el-form-item>
        <el-form-item label="讲师简介">
          <el-input v-model="teacher.intro" :rows="10" type="textarea" />
        </el-form-item>
        <!-- 讲师头像 -->
        <el-form-item label="讲师头像">
          <!-- 头衔缩略图 -->
          <pan-thumb :image="teacher.avatar" />
          <!-- 文件上传按钮 -->
          <el-button
            type="primary"
            icon="el-icon-upload"
            @click="imagecropperShow = true"
          >更换头像
          </el-button>
          <!--
      v-show：是否显示上传组件
      :key：类似于id，如果一个页面多个图片上传控件，可以做区分
      :url：后台上传的url地址
      @close：关闭上传组件
      @crop-upload-success：上传成功后的回调 -->
          <image-cropper
            v-show="imagecropperShow"
            :width="300"
            :height="300"
            :key="imagecropperKey"
            :url="BASE_API + '/eduoss/fileoss'"
            field="file"
            @close="close"
            @crop-upload-success="cropSuccess"
          />
        </el-form-item>

        <el-form-item>
          <el-button
            :disabled="saveBtnDisabled"
            type="primary"
            @click="saveOrUpdate"
          >保存</el-button
          >
        </el-form-item>
      </el-form>
    </div>
</template>
<script>
  import teacherApi from '../../../api/teacher/teacher'
  //引入头像组件
  import ImageCropper from '@/components/ImageCropper'
  import PanThumb from '@/components/PanThumb'

  export  default {
    //声明引入的组件
    components:{ImageCropper,PanThumb},
    data(){
      return{
        teacher:{},
        saveBtnDisabled:false,//保存按钮是否禁用
        imagecropperKey:0,//上传组件key值
        //上传弹框组件是否显示
        imagecropperShow:false,
        BASE_API:process.env.BASE_API,//获取dev.env.js里面

      }
    },
    created() {
      this.init();
    },
    watch:{
      $route(to,from){//路由变化方式
        this.init();
      }
    },
    methods:{
      //关闭上传弹框的方法
      close(){
        this.imagecropperShow=false;
        //上传组件初始化
        this.imagecropperKey = this.imagecropperKey+1;
      },
      //上传成功方法
      cropSuccess(data){
        this.teacher.avatar = data.url;
      },
      init(){
        if(this.$route.params&&this.$route.params.id){
          const id = this.$route.params.id
          this.getInfo(id);
        }else{
          this.teacher={}
        }
      },
      getInfo(id){
        teacherApi.getTeacherInfo(id)
        .then(response=>{
          this.teacher = response.data.teacher
        })
      },
      saveOrUpdate(){
          if(!this.teacher.id){
            //添加
            this.saveTeacher();
          }else{
            //修改
            this.updateTeacher();
          }

      },
      //修改讲师的方法
      updateTeacher(){
        teacherApi.updateTeacher(this.teacher)
        .then(response=>{
          //提示信息
          this.$message({
            type: 'success',
            message: '修改成功!'
          });
          //回到列表页面  路由跳转
          this.$router.push({path:'/teacher/table/list'})
        })
      },
      saveTeacher() {
        teacherApi.addTeacher(this.teacher)
        .then(response=>{
          //提示信息
          this.$message({
            type: 'success',
            message: '添加成功!'
          });
          //回到列表页面  路由跳转
          this.$router.push({path:'/teacher/table/list'})
        })
      },

    }
  }
</script>
